Adjusting mechanism adapted for line control



July 10', 1923- 1,461,420

L. HOLLAND-LETZ ADJUSTING MECHANISM ADAPTED FOR LINE CONTROL Filed Jan.29. 1921 2 Sheets-Sheet 1 July 10, 1923- 1,461,420

L. HQLLAND-LETZ I ADJUSTING MECHANISM ADAPTED FOR LINE CONTROL 5 FiledJan. 29. 1921 2 sheets-sh et z Patentecltluly 10, 1923.

' UNITED sTAE- S YLUDWIG HOLLAND-LEM,- or oAK eaten. ILLINOIS. r HADJUSTING iancnanisia anarrnn roe L nn CONTROL.

Apm qation fil ed January 29, 152a serial-no. 440,835 I TdaZZMhotn/z'tconcern: I I

Be it known that L-Lunw o Honnannpreferably takes the'form of a ratchetsec- Ln'rz, a citizen of the United States, and'a tor 16 (see Figs. 2 to:which preferably to element t epmaed; which I resident of- Oak Park, inthe'eounty of Cook has on the outside thereof the plurality' of andState of Illinois, have invented certain threaded apertures 17thereinflin the same 60 new and useful' Improvements in Adjustdiametrical line butjat "different. distance ing .Mechanism Adapted forLine Control, from the center so thatthe eccentric pin 18* z of whichthe-following, is a full, 'clear ,-and upon which thelink 15.- ispivoted maybe exact'specification. screwed atan'y necessary distancefrom the 1 "My invention is concer'ned'with a linecenter to adapt ittocarbureters having65 control mechanism, whichI have shown as arms 18 ofdifferent lengths, andyet'have'it which might be appliedto thethrottle-of holes by which it' may be bolted at or to control theposition ofthe spark, and it has mounted'in a boss 21 thereon awbearjuwhich is adapted for use whereveritmay ing shaft 22 on the "outer endofwhich is be necessary to shift anele'me nt back'andjournaled 'the fratchet sector 16, while-the forth. step by step by pulling ona line.operating lever 23 isfulcrum d it inner I 20 To illustrate my invention,Ia-nneX hereend. A rope 2 1- has one-end fastened in'thef75} of atractor driven by an explosion engine; rope the'driver can rotatethe-ratchet sector-8 .ating connectionsas seen inside elevation; of-thetractor through'its' throttle valve Fig.- 3 is atop plan viewof'thef-same irrespective of the angular "position .of :-the

Fig. 4 is aview'in section on the line the trailer. In practice,-to*fa'cilitate its; Hot Fig.:2;- i

Fig'. .5- is a fragmentary view of the positionkof the mechanism, asshown in mechanism shown in Fig; 1, but-in a difierdotted linesinfFig.'1,' and' run "the line 245'; *ent position'of thep'arts; p

, Fig. 6 is'j-a side elevation as seen. from omitted illustrating themforth'e sakeE-Of the right-of Fig. f the end of the bracket simplicity,it will be'understood that-the 40' Fig. 7 is a fragmentary view' of theaoping and reversing,- and" with another lin 951 tuating lever'detaehed,seen from the leftcontrol for'shifting thefgears, such, 'for in; handside of Fig. 4:; and 4 stance, as are shown in my applications Fig. 8is' adiagrammaticfview showing No. 103,735, filedAu'gustlti,192O,fantd'No.j how my invention, is applied to gas engine488,091, filed July 7,1921, respectively.

tractors which are provided with" automatic The apertures: 17 arepreferablyjformed[ 7 speed regulators. i in a; rib 27g-projecting fromthe'outerifaceof In carrying out myinvention as applied" the sector 16,and One'end "of 'saidjribf'c'o-"i to an ordinary gas engine tractor'9illusoperating with a'lstop lug 28 projectin trated i'n'FigQl, thecarbureter 10 is secured. from the outer side of'thebracket 19 when tothe under sidev of the manifold 11' at the throttle valveis closed,-"toward which tached to thejengine l2 in the customary j position thesector '16 is 'alwaysurged by" manner. The arm 13 controlling thethrottle the. helically coiled torsion spring 291 1 surf 1 valve 14:"(indic'a tedindotted 'lines),has piV- rounding the boss 21" on thebracket '19 and, otally connected'to its outer end a link 15," the hub30 of the sector 16v and havingitsx the other end of whichispivotallysecured ends engaging the lugs 31 and 32 on the ad-"lfoapplied to the throttle valve of the carbu: operate properly withoutchanging itother i reter of a gas engine for a: tractorfbut wise. Abracket 19 is provideds withatwo 15 a steam engine instead of a gasengine, desired place upon the-tractor frame," and- :1

to, two sheets of drawings inwhich the :same loop 25 of the lever,andextends rearward. v

reference characters are used to designate to any trailer (indicated byits tongue 26) v identical parts in all the figures of whichwhere thedriver may be located,-' ;and -;if Fig. 1 is a somewhat diagrammaticView repeatedly-pulling the free end of the Q;

having my invention applied thereto'; 16 backward or. forward ste bystep'flit? Fig. 2 is an enlargedview of the'operwill-beobviousthat'hecari control thef s'peedj' 36 artly in section on the line3 OfFigJ-Qytrailer to the tractorhor of his positionjon v manipulationfrom any"angle,"l reversepthe'f V I Y i over a pivotal sheave 242. Whilehavef which th p r g mechanism tractor will be provided "also with some"i mounted? form of line, control for starting andstop" jacent faces ofthe sector and bracket, respectively. Another helically coiled torsionspring 33 surrounding the boss 34 at the fulcrum of the lever 23 andhaving its ends engaging the lugs35 and 3.6 on the lever 23 and thebracket 19, respectively, always urges the lever 23 clockwise to11381101111241 position indicated in dotted lines in Fig. 2, where thelever is stopped by its adjacentside engaging a lug 3'? pr jecting fromthe rear of the bracket 19. The lever 23 has a web 38 projecting fromits front with a down turned portion 39, and the pivot pin 40 (see,Figs. 3 and 4) of a pair of pawls 41 and 42 passes through said portion39 and the body of the lever.

The pawls 41 and 42 co-operate with the teeth 43 of the ratchet sector16, the pawl 41 being hooked to advance the sector 16 one tooth eachtime it isswung from the dotted to the full line position of Fig. 2,while it and the pawl 42 also have an escapement action, to be describedflater, through their co-operation with the lifting fiange'44forming a part of the bracket 19 as seen in Figs 2 to 6, and

havingtwo cam surfaces 45 and 46 with which the ends of the pawls 42 and41 respectively, co-operate in the manner to be described. A helicallycoiled torsion spring 47surrounds the boss 48 of the pawl 41 and itsends engage the lug 49 (Fig. 3) on the pawl 42 and the body of the pawl41, respectively, to press the operating ends ofthe pawls intoengagement with the ratchet teeth 43 when they are not held out by theaction of the flange 44, the pawls 41 and 42 having-the extensions 50and 51, respectively, projecting rearwardly into the vertical plane oftheflange 44 and having their .under surfaces symmetrical with the teethengaging ends of their pawls. A hooked detent pawl 52 is fulcrumed on apin 53 carried by a lug 54 on the bracket 19 and has its inwardly,projecting end 55 normally held in engagement with the teeth 43 by thehelically coiled torsion spring 56 surrounding a boss 57 on the lug 54and having its ends engaging the lug 54 and an arm 58 projectingupwardly from the fulcrum of the pawl 52. When the lever 23 is pulled toits furthest position from normal as seen in full lines in Fig. 5, a lug59 projecting therefrom engages the end of the arm 58, rocking the end55 of the detent pawl out of engagement with the teeth 43, leaving thesector to be controlled by the escapement action of the pawls 41 and42'. A stiff helically coiled torsion spring 60 surrounds the annularboss 61 projecting rearwardly from the end of thebracket 19 and has oneend secured to said bracket while the other end 62 projects up into thepath of a lug 63 projecting forwardly from the lever 23 so as to beengaged therebv at the intermediate position of the lever shown in fulllines which offers an additional resistance to the pull of the leverindicating to the driver that the limit of that movement to open thethrottle has been reached, During this movement, the dog 41 advances theratchet one tooth and it is caught in the advanced position by the dog52. If it is to beopened wider, the swing of the lever-23 to the halfway position by pulling the rope 24 is repeated as often as isnecessary, advancing the ratchet sector a tooth atatime until thedesired speed of the engine is obtained. When thethrottle is to beclosed, the rope is pulled as before to the half way position, advancingthe ratchet sector 16 another tooth, but instead of stopping when theadditional resistance of the spring 62 is encountered, the pull iscontinued until the parts reach the full line position shown in Fig. .5.This results in the following action of the parts: The dog 41 mevesforward carrying with it the ratchet sector 16 before its nose 50 ridesup on the cam surface 46 and is disengaged from the tooth before theratchet sectorhas been advanced far enough for the dog 52 to catch inanother tooth.

At the sa netime that the n. se 50 is riding p on the a ur ace 46, he noe 5. o th pawl 42 rides down the cam ,surface45,;and rests either on topof the tooth directly beneath it, or preferably slightly past the pointof the tooth, so that when-the lug 59 strikes the arm 58 and lifts thenose 55 of the dog 52 out of engagement with the ratchet teeth, thusallowing the spring 29 to throwthe ratchet sector back, the said sectorcan swing back only until the tooth inadvance of the nose 51 of the pawl42 engages it and stops the backward movement of the ratchet sectorbefore it has moved the full length ofa tooth. The op erator now allowsthe arm 23 to swing back under the influence of the spring 33 to thepoint where the lug 63 disengages itself from the end 62 of the spring60, or any dis tance beyond that, except that it must not be allowed tomove all the way back so that the nose 50 of the pawl 41 catches a newtooth. During this backward movement, the nose 51 of the pawl 42 ridesup on the surface 45, and disengages itself from the tooth, but beforethis happens, the lug 5.9 on the lever 23 has moved back far enough toallow the spring 56 to throw the detent 52 into operation again so thattheratchet segment 16 can only move backward the fraction of'a toothnecessary to bring the adjacent tooth into engagement with the nose 55on the pawl 52. This action-is substantially that of an escapement, andthe result of the complete forward pull of the lever 23 from the. dottedline position of Fig. 2to the full line position of Fig. .5 and itsreturn to the full line position ofFig. 2,is to first advance theratchet sector '16 one tooth and then allow it to spring back one tooth.The operator then pulls the lever 23 forward fro-mthe middle position tothe full line position of Fig. 5 and allows it tO' swing backtothemiddle position,and the result of this movement is to allow theratchet sector 16- to move 16, 1 form a surface 43 over which thenose 50of thepawl 4:1 reciprocates idly if it be attempted by repeated movementof the le- VGT'23 to swing the sector 16 beyond the wide open positionof the throttle.

Where the invention is applied to a tractor Ihaving an automatic stopgovernor, which is shown diagrammatically in Fig. 8, instead of the link15 extending from the crank pin .18 to the arm 13, a. divided link madeof the two parts 15 and 15 is employed, and the adjacent ends havehooks. engaging'loops 1n the ends of the helically coiled contractile.spring 15. Connected to the arm 13 of the throttle valve is a link 64which is connected at the'other end to the lever 65 fulcrumed at 66 on.the casing 67 for-the governor, which is shown as consisting of anextension 68 of the engine shaft having ,mounted thereon the pair ofcentrifugalfgovernor weights 69 which have the arms 7 0 engaging a disk71 sliding on the reduced end of the shaft 68 andfseparated by theball-bearing 72 from the flange 73 on the inner. end of the stud 74mounted to rotate on said re duced inner end and having its outer'endengaging the lever 65 so that when the. engine speeds up, the governorWeights 69 are thrown out and the stud 74: is pushed out,

swinging the lever 65 to ,draw the arm 13' in the proper direction toclose the throttle and thus bring the speed of the engineback to thedesired limit. By the use of the arm 23, the tension of the spring 15canbe i ncreased or diminished as may be necessary to affect the desiredspeed for which the automatic speed governor is set. I

While Ihave shown and described my in vention as embodied in the formwhich I at present consider best adapted to carry out its purposes, itwill be understood that it capable of modifications, and that I do not;

desire to be limited in: the interpretation of.thefollowingclaims,'exc'ept as may be neoessitated by the stateof thepriorart.

What I] claim as new and desire to secure by Letters Patent of theUnited States is 1. In an apparatus of the class described,

the combination with an element tobe re GlPI'OiCiLtGCl, of areciprocatingactuating ele-.

ment, a flexible element connected to the actuating elementftomovethelatterin one direction, means to. returnthe actuating ele-.

ment automatically when moved from its normal position by said flexibleelement, and

connections between said element to be re; cipr ocated and saidactuating element which by pulling the flexible element in atertain waymoves the element to be reciprocated in one direction and by pulling itin another way moves the element to be reciprocated in the otherdirection. I

2. In an apparatus of the. class described, the combination with ,anelement to be rec-iprocated,ot a reciprocating actuating element,a'fleXible element connectedQto the actuating element tomove-the la tterin one direction, a spring to return'the actuating elementautomaticallywhen moved from its normal position by said flexibleelement, and

connectionsbetween said-element to be re? ciprocated and said actuatingelement which by 'pullingthe flexible'element in a certain way movestheelement to be' reciprocated in One direction andgby. pulling it inanother way moves the element't'o be reciprocated in theother'direction. Y 3. In an. apparatus of the class described,

the comb-inationwith an element to be reciprocated, of a reciprocatingactuating element, a flexible element connected to theaetuatin'gelementto.move the latter in one direction, means .to, returntheactuating elementautomatically, when movedfrom its normal position bysaid. flexible element, a

spring tending to return the element to be reciprocated when advancedfrom'its normal position, detent mechanism to hold it advanced, andconnections between said ele- .ment to be reciprocated andsaid actuatingelement by which a short pull. on the'fiexible element advancestheelement to be reciprocated a short distance where it is held by, the

detent, and a. longer pull releases the detent and allo-wsthe spring tomove it back.

4. Inan apparatus otthe class described,

the combination with an element to be reciprocated, of ratchet teethassociated with said 7 element, a spring tending to move it backward, avdetent co-operating-with the teeth to hold it advanced, a reciprocatingactuating element, a flexible element connected to the actuating elementto move the latter in one direct on, means-to return the actuatingelement automatically when moved from its,

normal position by saidflexible element, and

connections between the teeth of said elee menace.

ment to be reciprocated and said actuating element whereby a short pullof the flexible element advances the element to be rec-ipros cated onetooth where it is caught by the detent, and a further pull beyond theposition towhich it is brought by the short pull releases the detent andallows the element to be reciprocated to move back the distance of onetooth.

5. In an apparatus of the class described, the combination with anelement to be reciprocated, ot a reciprocating actuating element, aflexible element connected to the actuating element to move the latterin one direction, means to return the actuating element automaticallywhen moved from its normal position by said flexible element,connections between said element to be reciprocated and said actuatingelement which by pulling the flexible element in a certain way inovesthe element to be reciprocated in one direction and by pulling it inanother way moves the element to be reciprocated in the other direction,and a yielding stop associated with said connections to indicate by itsresistance that the limit of the pull to move the element to berecigrocated in one direction has been reached.

6. In an apparatus of the class described, the combination with anelement to be re ciprocated, ot a reciprocating actuating element, aflexible element connected to the actuating element to move the latterin one direction, means to return the actuating element automaticallywhen moved from its normal position by said flexible element,connections between said element to be reciprocated and said actuatingelement which by pulling the flexible element in a certain way moves theelement to be reciprocated in one direction. and by pulling it inanother way moves the element to be reciprecated in the other direction,and a strong spring normally not energized serving as a yielding stop.

7. In an apparatus of the class described, the combination with anelement to be reciprocated, of a reciprocating actuating element, aflexible element connected to the actuating element to move the latterin one directidn, means to return the actuatin element automaticallywhen moved from its normal position by said flexible element, ratchetteeth associated with the element to be reciprocated, a pair of pawlscarried by the actuating element co-operating with the teeth, a lift ing flange co-operating alternately with said pawls to move them out ofengagement with the teeth, a detent pawl co-operating with the teeth anda spring tending to move the element to be reciprocated backward, saidelements being so designed that a short pull of the flexible elementadvances the element to be reciprocated one tooth and holds it withouteither of the two pawl being attected by the lifting flange, while thelonger pull causes one of said pawls to be lifted by the flan e and theother to be released from the flange, and the detent pawl to be liftedout of the teeth by the movement of the actuating element so that thetotal result of the longer movement is to first advance the ele ment tobe reciprocated one tooth, then reactuating lever fulcrumedconcentrically with the sector, a pair of spring pressed pawls carriedby the lever and adapted to engage the teeth of the sector, a liftingflange adaptedto hold said pawls alternate ly out of engagement with theteeth, a spring tending to return the actuating lever and a springpressed detent pawl engaging the teeth, the parts being so proportioned,and designed o that when the actuating lever is moved. forward from itsinitial position a unit distance one of the pawls advances the ratchetsector a toot-h, where it is held by the detent pawl, while when it ismoved farther the actuating lever engages against the detent pawl andthe lifting flange permits one of the pawls carried by the lever toalternate in its action with the detent pawl to form an escapementwhereby the ratchet sector can be moved backward a tooth at a time byreciprocating the actuating lever back and forth beyond the unitdistance.

9. In an apparatus'ot the class described, the combination witha'ratchet sector, of a spring tending to move it backwardly, an;

actuating lever fulcrumed concentrically with the sector, a pair ofspring pressed pawls carried by the lever and adapted to engage theteeth of the sector, a lifting flange adapted to hold said pawlsalternate 1y out of engagement with the teeth, a spring tending toreturn the actuating lever, a spring pressed detent pawl engaging theteeth, the parts being so proportioned. and designed so that when theactuating lever is moved forward from its initial position a unitdistance one of the pawls advances the ratchet sector a tooth, where itis held by the detent pawl, while when it is moved farther the actuatinglever engages against the detent pawl and the lifting flange permits oneof the pawls carried by the lever to alternate in its action with thedetent pawl to form an escapement whereby the ratchet sector can bemoved backwarda tooth at a time by reciprocating the actuatiug leverback and forth beyond the unit distance. and a yielding stop for saidactuating lever to indicate by the increased resistance which itofferswhen the limit of the unit distance ,has been reached in theforward movement of the actuating lever.

10. In an apparatus of the-class described, the combina tion:with aratchet sector, of

a spring tending to mo-ve it bachwardly, an

actuating lever :ful-crumed 1 concentrically with-theysector, a pairof.-' spring .pressed pawls carried by the'lever and adapted to engagethe teeth of the sector, a lifting flange adapted to holdsaid pawlsalternate- 1y out of engagement with the teeth,- a spring tending toreturn the actuating lever, a spring pressed detentpawlengaging theteeth,the parts being so proportioned and designed so that when theactuating "lever is moved forward from its "initial position a unitdistance one of the pawls advances the ratchet sector a-tooth, where itis held by the detent pawl, while when it is moved farther theactuating'lever engages against the detent pawl and the lifting flangepermits one of the pawls carried by the lever to alternate in its actionwith the detent pawl to form an escapement whereby the ratchet sectorcan be moved backward a tooth at a time by reciprocatingthe actuatinglever back and forth beyond the unit distance, and a strong springnormally not under tension coiled about the axis of the actuating leverand having an end extending into the path thereof when the lim t of theunit distance has been reached.

11. In a tractor, the combination with an engine, of'a throttle valvecontrolling the speed thereof, a reciprocatingelement connected to saidvalve, a flexible member, and connectionsbetween said flexible memberand reciprocating element whereby by repeatedly pulling the flexiblemember the throttle valve may be opened and closed toany desired extent.i i

12. In a tractor,,the combination with an engine, of a throttle valvecontrolling the speed thereof, a reciprocating velement connected tosaid valve, a flexible, member, and

connections between said flexible member and reciprocating elementwhereby b'y pulling the flexible member the reclprocating element may bemoved step by step in either direction so as to open and closethethrottle valve to any desired extent.

13. In a tractor, the combination w1th an engine, of a throttle valvecontrolling the speed thereof, an element to be reciprocated' connectedto said valve, a reciprocating actuating element, a' flexible elementconnected.

to the actuating element .to move the latter in one direction, means toreturn the actuating element automaticallywhen moved from its normalposition by said flexible element,

and connections between said element tobe reciprocated and saidactuating element which by pulling the flexible element in a certain waymoves the element to be reciprocated in one direction and bypulling inactuating element automatically when it is moved from its normalposition by said flexible element, a spring tending to return'theelement tobereciprocated when advanced from itsnormal position, a'detent mechanism to hold it advanced, andcohnections between saidelement to be reciprocated and said actuating element-by which a shortpull .011 the flexibleaelement advances the element to be reciproclateda short distance where it is held by the detent, and a longer pullreleases the detent and allows the spring to move it back.

15. In a tractor, the combination with anengine, of a throttle valvecontrolling the speed thereof, an element to be reciprocatedconnectedtothe throttle valve, ratchet teeth assoclated with said,elementya spring tend-1 mg to move'it. backward, a detent cooperatingwith the teeth tohold it advanced, a

reciprocating actuatingelement, a flexible element connected to theactuating element to move the latter in one directlon, means to returnthe actuating element automaticallywhen moved from its normalposition bysaid flexible element, and connections between the teeth'of said elementto be reciprocated and whereby a short pull of the flexible elementadvances the element to be reciprocated one tooth where it is caught bythe detent, and a further pull beyond the position to which it isbrought by the short pnllpreleases the detentand allows the element tobe reciprocated to move back the distance of one tooth.

engine. of a throttle valve controlling-the speed thereof, an element tobe 'reciprocated connected to-said valve, a reciprocating.

actuating element, a flexible element con nected to the actuatingelement to move the latter 1n one directlon, means to return the saidactuating element 16. In a tractor, the combination with an I actuatingelement automatically whenmoved from its normal position bysaidflexibleele-- I 'ment, ratchet teeth associated with the, element to bereciprocated, a pair v of pawls carried by the actuating elementcooperating with the teeth, a lifting flange cooperating alternatelywith said pawls to move them out of engagement with the teeth, a detent"pawl cooperating with the teeth and a spring tending to, move theelement to be recipro-Q cated backward, said element being so designedthat a short. pull of the flexible element advances-the element toberecipro b Y the movement of the actuatin elementso that the totalresult of the longer movement is to first advance the element to bereciprocated one tooth, then return it one tooth, leaving the parts inposition whereby the repetition of the final portion of the longermovement *ill permit the element to be-reciprocated to move back step bystep.

17. In an apparatus of the class described, the combination with anelement to be reciprocated, of a reciprocating actuating element, atflexible element connected to the actuating element to move the latterin one direction, means to return the actuating element automaticallywhen moved from its normal position by said flexible element,connections between said element to be reciprocated 'ztn'd'saidactuatingelement whereby pulling the flexible element in a certain waymoves the element tobe reciprooeted in one direction and by pulling itanother Way moves the element to be reciprocated' in the otherdirection, and a signaling device associated with said connections toindicate that the limit of the pull to move the ele ment to bereciprocated in one direction has been reached.

In Witness Wherof, I have hereunto set my hand and afiixed my sea-l,this 17th day of January, A. D. 1921.

LUDWIG HOLLAND-LETZ.

